Social investing has come of age, driven by a new generation that is redefining the notion of acceptable returns. These new investors still want to make money, of course. But they are also insisting on measurable social good. MoreHong Kong's Champagne-Swilling Leader Heckled, Jeered NBC NewsBillion-Dollar Bombing: U.S. Spends Millions a Day to Fight ISIS NBC NewsCalifornia Mayor Fatally Shot in Domestic Dispute NBC NewsEbola Diagnosed In U.S.